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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Fulvestrant Impurity 12 Fulvestrant Impurity 12
Linagliptin Impurity 56 Linagliptin Impurity 56
Linagliptin Impurity 61 Linagliptin Impurity 61
Ornidazole Impurity 16 Ornidazole Impurity 16 1565482-62-3 C7H11ClN2O
Oseltamivir Impurity 46 Oseltamivir Impurity 46
Oseltamivir Impurity 53 Oseltamivir Impurity 53
Palbociclib Impurity 66 Palbociclib Impurity 66
Peramivir Impurity 13 Peramivir Impurity 13 2641684-79-7 C13H27ClN4O3
Pimecrolimus Impurity 2 Pimecrolimus Impurity 2
Rosuvastatin Impurity 81 Rosuvastatin Impurity 81
Rosuvastatin Impurity 102 Rosuvastatin Impurity 102
Tazobactam Impurity 14 Tazobactam Impurity 14
Ticagrelor Impurity 124 Ticagrelor Impurity 124
Tofacitinib Impurity 113 Tofacitinib Impurity 113
Voriconazole Impurity 20 Voriconazole Impurity 20
Carbocistein Impurity F Carbocistein Impurity F
Cilastatin EP Impurity B Cilastatin EP Impurity B
Olaparib Impurity 14 Olaparib Impurity 14 2250242-62-5 C36H28F2N6O4
Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide 24683-26-9 C12H13NO5S
Sugammadex Sugammadex 1378831-29-8 C6H10O3S2
Petunidin 3-O-glucoside Petunidin 3-O-glucoside 71991-88-3 C22H23O12+
1-(2,3-Dihydro-1,4-benzodioxin-2-ylcarbonyl)piperazine hydrochloride 1-(2,3-Dihydro-1,4-benzodioxin-2-ylcarbonyl)piperazine hydrochloride 70918-74-0 C13H17ClN2O3
[4-[2-[(4-chlorobenzoyl)amino]ethyl]phenyl] 4-chlorobenzoate [4-[2-[(4-chlorobenzoyl)amino]ethyl]phenyl] 4-chlorobenzoate 41859-56-7 C22H17Cl2NO3
N-(2,4-DICHLORO-5-HYDROXYPHENYL)ACETAMIDE N-(2,4-DICHLORO-5-HYDROXYPHENYL)ACETAMIDE 67669-19-6 C8H7Cl2NO2
Brimonidine Impurity B Brimonidine Impurity B
Diquafosol Impurity C Diquafosol Impurity C
Bortezomib Impurity 19 Bortezomib Impurity 19
Apixaban Impurity 40 Apixaban Impurity 40
Axitinib Impurity 3 Axitinib Impurity 3
Sofosbuvir Impurity 10 Sofosbuvir Impurity 10
Venlafaxine Impurity 10 Venlafaxine Impurity 10 1997279-63-6 C17H27NO2
Dapoxetine Impurity 3 Dapoxetine Impurity 3
Regorafenib Impurity 16 Regorafenib Impurity 16
Topiroxostat Impurity 7 Topiroxostat Impurity 7
Tofacitinib Impurity 12 Tofacitinib Impurity 12
Ticagrelor Impurity 16 Ticagrelor Impurity 16
Ticagrelor Impurity 22 Ticagrelor Impurity 22
Milrinone Impurity 5 Milrinone Impurity 5
Caspofungin Impurity 4 Caspofungin Impurity 4 258510-40-6 C49H78N8O17
Canagliflozin Impurity 27 Canagliflozin Impurity 27
Loxoprofen Impurity 1 Loxoprofen Impurity 1
Febuxostat Impurity 54 Febuxostat Impurity 54
Silodosin Impurity B Silodosin Impurity B
Cefminox Sodium impurity F Cefminox Sodium impurity F
Clindamycin Impurity F Clindamycin Impurity F
Fasudil iMpurity D Fasudil iMpurity D
2-((4R,6R)-6-(2-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic acid 2-((4R,6R)-6-(2-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic acid 929540-41-0 C36H41CaFN2O5
Doxofylline iMpurity C Doxofylline iMpurity C
Puerarin-4'-O-β-D-glucopyranoside Puerarin-4'-O-β-D-glucopyranoside 117047-08-2 C27H30O14
N-Propyl-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one N-Propyl-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-3-benzazepin-2-one 2512208-76-1 C15H21NO3
4-Desmethyl 3-Methyl Vortioxetine Hydrochloride 4-Desmethyl 3-Methyl Vortioxetine Hydrochloride 1293343-01-7
OFLOXACIN N-OXIDE (MIXTURE OF DIASTEREOMERS) OFLOXACIN N-OXIDE (MIXTURE OF DIASTEREOMERS) 104721-52-0 C18H20FN3O5
4-[[2-(2-Amino-4-thiazolyl)acetyl]amino]-benzeneacetic Acid 4-[[2-(2-Amino-4-thiazolyl)acetyl]amino]-benzeneacetic Acid 1365244-64-9 C13H13N3O3S
PEONIN CHLORIDE(SH) PEONIN CHLORIDE(SH) 132-37-6 C28H33ClO16
Telmisartan tert-Butyl Ester Telmisartan tert-Butyl Ester 144702-26-1 C37H38N4O2
Amido Ethyl Meloxicam (Meloxicam Impurity) Amido Ethyl Meloxicam (Meloxicam Impurity) 881399-30-0 C16H17N3O4S2
(S)-Ethyl 2-((3S,5aS,9aS,10aS)-3-methyl-1,4-dioxodecahydropyrazino[1,2-a]indol-2(1H)-yl)pentanoate ,95% (S)-Ethyl 2-((3S,5aS,9aS,10aS)-3-methyl-1,4-dioxodecahydropyrazino[1,2-a]indol-2(1H)-yl)pentanoate ,95% 129970-98-5 C19H30N2O4
4'-(Difluoromethoxy)acetanilide 4'-(Difluoromethoxy)acetanilide 22236-11-9 C9H9F2NO2
EthanediaMide, N1-(5-chloro-2-pyridinyl)-N2-[(1S,2S,4R)-4-[(diMethylaMino)carbonyl]-2-[[(4,5,6,7-tetrahydro-5-Methylthiazolo[5,4-c]pyridin-2-yl)carbonyl]aMino]cyclohexyl]- EthanediaMide, N1-(5-chloro-2-pyridinyl)-N2-[(1S,2S,4R)-4-[(diMethylaMino)carbonyl]-2-[[(4,5,6,7-tetrahydro-5-Methylthiazolo[5,4-c]pyridin-2-yl)carbonyl]aMino]cyclohexyl]- 1255529-28-2 C24H30ClN7O4S
N-carbaMoyl-2-Methyl benzene sulfonaMide N-carbaMoyl-2-Methyl benzene sulfonaMide 39051-77-9 C8H10N2O3S
Capecitabin iMpurity Capecitabin iMpurity 71609-08-0 C9H12FN3O4
4-[[(2RS)-2-Hydroxy-3-(isopropylaMino)propyl]oxy]benzaldehydeHydrochloride (4-[(2RS)-2-Hydroxy-3-[(1-Methylethyl)aMino]propoxy]benzaldehydeHydrochloride) 4-[[(2RS)-2-Hydroxy-3-(isopropylaMino)propyl]oxy]benzaldehydeHydrochloride (4-[(2RS)-2-Hydroxy-3-[(1-Methylethyl)aMino]propoxy]benzaldehydeHydrochloride)
2-(((3aS,4R,6S,6aR)-6-((5-amino-6-chloro-2-(propylthio)pyrimidin-4-yl)amino)-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-yl)oxy)ethan-1-ol 2-(((3aS,4R,6S,6aR)-6-((5-amino-6-chloro-2-(propylthio)pyrimidin-4-yl)amino)-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-yl)oxy)ethan-1-ol C17H27ClN4O4S
Clindamycin impurity Clindamycin impurity 198080-64-7 C18H32N2O5S
Digoxin impurity Digoxin impurity
Lamivudine impurity Lamivudine impurity
Levothyroxine Sodium impurity Levothyroxine Sodium impurity 27566-09-2 C14H21NO4
Dexchlorpheniramine impurity Dexchlorpheniramine impurity 73775-50-5 C12H15ClN2
(S)-N-(2-(1-(3-ethoxy-4-hydroxyphenyl)-2-(methylsulfonyl)ethyl)-1,3-dioxoisoindolin-4-yl)acetamide (S)-N-(2-(1-(3-ethoxy-4-hydroxyphenyl)-2-(methylsulfonyl)ethyl)-1,3-dioxoisoindolin-4-yl)acetamide 1384441-38-6 C21H22N2O7S
(1R,2S,3S)-Aprepitant (1R,2S,3S)-Aprepitant 172822-28-5 C23H21F7N4O3
(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole compound with 6-methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole (1:1) (((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole compound with 6-methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole (1:1)
6-benzyloxy-8-((R)-2-chloro-1-hydroxy-ethyl)-4H-benzo[1,4]-oxazin-3-one 6-benzyloxy-8-((R)-2-chloro-1-hydroxy-ethyl)-4H-benzo[1,4]-oxazin-3-one 869478-11-5 C17H16ClNO4
ethyl (41R,13aS)-13a-ethyl-2,3,41,5,6,13a-hexahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine-12-carboxylate ethyl (41R,13aS)-13a-ethyl-2,3,41,5,6,13a-hexahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine-12-carboxylate 77549-94-1 C22H26N2O2
Dolutegravir Impurity 2 Dolutegravir Impurity 2
Lesinurad Impurity J Lesinurad Impurity J 1210330-64-5 C14H10BrN3O2S
2-CHLOROMETHYL-3-METHYL-4-(2,2,2-TRIFLUOROETHOXY)PYRIDINE 2-CHLOROMETHYL-3-METHYL-4-(2,2,2-TRIFLUOROETHOXY)PYRIDINE 128430-66-0 C9H9ClF3NO
1-(2,3-EPOXYPROPYL)-2-METHYL-5-NITROIMIDAZOLE 1-(2,3-EPOXYPROPYL)-2-METHYL-5-NITROIMIDAZOLE 16773-52-7 C7H9N3O3
Bendamustine Related Impurity 12 Bendamustine Related Impurity 12
Bendamustine Related Impurity 3 Bendamustine Related Impurity 3
Edoxaban Impurity 26 (1R,2S,4R) Edoxaban Impurity 26 (1R,2S,4R) 1255529-33-9 C21H30ClN5O5
Ezetimibe Impurity 36 Ezetimibe Impurity 36 1809031-15-9 C39H46F2N2O5Si2
Linagliptin Impurity 29 Linagliptin Impurity 29 2074688-82-5 C58H58N16O6
Methylprednisolone Acetate EP Impurity H Methylprednisolone Acetate EP Impurity H 1968-76-9 C24H32O4
Rivaroxaban Impurity 44 Rivaroxaban Impurity 44
Sitafloxacin Impurity 3 Sitafloxacin Impurity 3
Tenofovir Impurity 39 Tenofovir Impurity 39
Ticagrelor Related Compound 82 Ticagrelor Related Compound 82
Vonoprazan Impurity 20 Vonoprazan Impurity 20
N-(2,6-Dimethylphenyl)-4-[2-hydroxy-3-(4-methoxyphenoxy)propyl]-1-piperazineacetamide N-(2,6-Dimethylphenyl)-4-[2-hydroxy-3-(4-methoxyphenoxy)propyl]-1-piperazineacetamide 1393717-45-7 C24H33N3O4
methyl (4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(ethyl)carbamate methyl (4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(ethyl)carbamate 1361570-27-5 C21H21FN8O2
Cefathiamidine Impurity G Cefathiamidine Impurity G
Olaparib Impurity P Olaparib Impurity P
Ozagrel Impurity 1 Ozagrel Impurity 1
Pidotimod Impurity P Pidotimod Impurity P
Pitavastatin Impurity 11 Pitavastatin Impurity 11
Pramipexole Impurity 18 Pramipexole Impurity 18
Tenofovir disoproxil Impurity 18 Tenofovir disoproxil Impurity 18
Tenofovir Impurity 50 Tenofovir Impurity 50
Darunavir Darunavir 1526916-57-3 C22H31N3O5S
(S)-3-(4-(2,5-dibromobenzyl)phenoxy)tetrahydrofuran (S)-3-(4-(2,5-dibromobenzyl)phenoxy)tetrahydrofuran C17H16Br2O2
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